Nest Thermostat Compatibility Check for Central HVAC

[Mddominguez]

Hi, I’d like to check if my thermostat/AC is compatible with the Nest learning thermostat. I read the HVAC cannot be 110V or 120V, but my thermostat doesn’t have any labels, but the switch box says 120v/240v.

Attached a few pictures, thanks in advance for the help.

[David_K · Accepted solution]

Looking at the thermostat wires, it should be compatible with all models of Nest Thermostat. It's worth noting that Nest Thermostats are designed to work without a common ("C") wire. During installation, a small number of customers find that the thermostat does not receive sufficient power from their system. To solve that, the Nest Power Connector or a C wire may be necessary. More information at g.co/nest/cwire.

Nest thermostat compatibility - Google Nest Help